import type { DropEventParams, Grid, RowGroupModelItem } from "../+types.js";
import type { GridBoxItem } from "./+types.js";
export interface UseRowGroupBoxItems<T> {
    readonly grid: Grid<T>;
    readonly orientation?: "horizontal" | "vertical";
    readonly hideColumnOnGroup?: boolean;
    readonly includeGroupables?: boolean;
    readonly placeholder?: (el: HTMLElement) => HTMLElement;
}
export declare function useRowGroupBoxItems<T>({ grid, orientation, hideColumnOnGroup, includeGroupables, placeholder, }: UseRowGroupBoxItems<T>): {
    rootProps: {
        accepted: string[];
        onRootDrop: (p: DropEventParams) => void;
        orientation: "horizontal" | "vertical" | undefined;
        grid: Grid<T>;
    };
    items: GridBoxItem<RowGroupModelItem<T>>[];
};